The fastest accordion player is Liam O’Connor (Ireland) who played Tico Tico at a speed of 11.67 notes per second on the Rick O’Shea show on 2FM in Dublin, Ireland, on 8 November 2006, as part of Guinness World Records Day.

http://www.liamoconnormusic.com/frameset.htm
2FM – Rick O’Shea Show http://www.rte.ie/2fm/rickoshea/

Clip: http://www.rte.ie/rams/radio/latest/wed/rte-2fm-rickoshea.smil
Piece starts 1hr 48 minutes in, runs for 5 minutes approx.

RTE 1 – Six-One News (Main evening news) http://www.rte.ie/news/2006/1109/6news.html

Clip: http://dynamic.rte.ie/av/230-2190509.smil

(and if you click on the “Entire Show” link here, http://dynamic.rte.ie/av/2190459.smil, and skip through to 37mins 40, there’s a teaser, which shows me clapping like a muppet!).

RTE Radio 1 – Mooney http://www.rte.ie/radio/mooneygoeswild/archive/index.html

Clip: http://www.rte.ie/radio/mooneygoeswild/rams/2006/09november.smil
Piece starts about 8 minutes into the programme, runs for over 12 minutes.